Comparison

C vs Sailmate

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

C

Access up-to-date nautical charts for global exploration and planning. Save points of interest and routes, record tracks, and view marine weather. Upgrade for offline maps, GPS, and advanced features like shaded relief and AIS.

Highlights
  • Free chart viewer
  • Autorouting
  • Personal waypoints
  • Track recording
  • Marine weather forecasts
  • Offline map downloads
  • High-resolution bathymetry
Features
Read full description

The C-MAP® App is the perfect companion for recreational boaters and water-lovers. Available on Mobile, Tablet or PC, you’ll always be able to access the most up to date C-MAP charts, wherever in the world you are. With full features, allowing you to explore, plan and save Points of Interest and Routes from wherever you are, the C-MAP App is the perfect aid to navigation for savvy boaters. The C-MAP App Includes: - FREE Chart Viewer - Autorouting™ – find the best route to your favourite places - Personal Waypoints - Track Recording - Thousands of pre-loaded Points of Interest - Marine Weather Forecast - Weather Along the Route - Weather Overlay - Chart Personalisation - Import & Export GPX Files – share your Routes, Tracks or Waypoints with friends - Measure Distance Tool Upgrade to Premium to unlock additional features, including: - Full GPS Functionality - Offline Map Downloads - REVEAL Shaded Relief - High-Resolution Bathymetry - Custom Depth Shading - AIS & C-MAP Traffic Try before you buy… Experience C-MAP App Premium for yourself, with a free 14-day trial (3-day trial in Denmark and Sweden). The C-MAP App updates on a continual basis, ensuring the latest, most up-to-date maps are always at your fingertips. Payment will be charged to iTunes Account at confirmation of purchase. Subscription automatically renews unless auto-renew is turned off at least 24-hours before the end of the current period. Account will be charged for renewal within 24-hours prior to the end of the current period, and identify the cost of the renewal. Subscriptions may be managed by the user and auto-renewal may be turned off by going to the user's Account Settings after purchase. Links to Your Privacy Policy and Terms of Use. Any unused portion of a free trial period, if offered, will be forfeited when the user purchases a subscription to that publication, where applicable Privacy Policy: https://www.brunswick.com/dsar Terms of Service https://appchart.c-map.com/tos.html

About

Sailmate

This app offers worldwide charts, weather forecasts, and route planning for sailors and boaters. Connect with a community to share locations, rate marinas, and view events. It also includes a signal code identifier and country flags.

Highlights
  • Worldwide nautical charts
  • Offline chart downloads
  • 5-day wind and weather predictions
  • Route planning and ETA
  • Trip recording and sharing
  • Community marina ratings and events
  • International signal code identifier
Features
Read full description

Sailmate is a free and easy to use app for sailors and boaters. It provides charts worldwide showing thousands of harbours and marinas and their characteristics, along with numerous buoys, beacons and lights. A directory conveniently sort harbours per countries and regions. In addition to Sailmate own charts, thousands of nautical charts from various authorities could be downloaded and viewed offline, in the USA, Alaska and Hawai (NOAA), France (Shom), Finland, Norway. A comprehensive weather menu gives instant access to weather data, including wind 5-day predictions, actual and forecast weather at thousand of locations, satellite charts. A moving map provides route planning, ETA, heading to waypoint and more. You could create an unlimited number of personal waypoints. Sailmate records performed trips and allow to review later boat paths or share them with friends. You could take pictures during trips, and view them at their location on the map. This social app allows sailors and boaters to exchange together, rate marinas and suppliers, view events, share good anchorage locations... An helpful annex is provided to quickly identify any signal from the international signal code and any country flag.

Screenshots

C4 screens
Sailmate4 screens

Verdict

The call

The clearest difference is rating: C at 4.5 against Sailmate's 3.0. C also leads on review sentiment (51% vs 17%) and ratings volume (2.3K vs 1). Sailmate's advantage is iOS requirement (9.0 vs 15.1). On price, update cadence, ads and in-app purchases there is nothing between them.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. C sells 10 in-app purchases, starting at $1.99 per month and Sailmate sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

ReceptionRating · Positive reviews · Number of ratings

C holds the better App Store score, 4.5 against 3.0. That said, the two scores are not equally well evidenced: C has 2.3K ratings behind it against 1, so its average is the more settled of the two. Written reviews point the same way: 51% of C's written reviews are positive against 17% of Sailmate's.

UpkeepUpdate frequency

Both ship on a similar rhythm, roughly every 6 weeks. The most recent releases landed on October 13, 2026 and October 7, 2026 respectively.

Scorecard5 real differences · 6 level
C versus Sailmate: the parameters behind the verdict, then further details
ParameterCSailmate
PriceFreeFree
Rating4.5 (2.3K ratings) — better3.0 (1 ratings)
Positive reviews51.0% of reviews — better16.7% of reviews
Number of ratings2.3K — better1
Update frequencyEvery 6 weeksEvery 6 weeks
AdsNoNo
In-app purchasesYesYes
MonetizationFree with in-app purchasesFree with in-app purchases
Best chart rank#112 — better—
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS15.19.0 — better
Further details — not scored
Size169 MB144 MB
Age rating4+4+
DeveloperNavico Norway ASMyriel Aviation SA

Customer experience

C

All ratings2,347 ratings
Positive89.3%
Neutral3.1%
Negative7.6%
Written reviews512 reviews
Positive51.0%
Neutral8.6%
Negative40.4%

Sailmate

All ratings1 ratings
Positive0.0%
Neutral100.0%
Negative0.0%
Written reviews6 reviews
Positive16.7%
Neutral16.7%
Negative66.7%

Bugs and requests

C

Reported bugs

4 issues
  • App crashes when trying to save tracks or routes
  • Offline maps fail to download or disappear
  • Depth/contour data inaccurate or not displaying properly
  • Login and authentication issues preventing access

Requested features

4 requests
  • Add mast height/clearance feature
  • Improve AIS integration and functionality
  • Allow more customization of map views and data
  • Provide better customer support and communication

Sailmate

Not enough reviews yet to summarise bugs or requests.

In-app purchases

10 purchases

C

Subscriptions10
  • Embark Advanced Weather$1.991 Month
  • Embark Offline Maps USA$2.491 Month
  • Annual Subscription14 Days trial$14.991 Year
Show 7 more
  • Annual subscription14 Days trial$14.991 Year
  • Region14 Days trial2 variants$18.991 Year
  • North America14 Days trial$23.491 Year
  • Maps Lakes South East USA14 Days trial$25.991 Year
  • Annual Subscription14 Days trial$29.991 Year
  • Caribbean14 Days trial$32.991 Year
  • Maps USA East Coast & Bahamas14 Days trial$39.991 Year
1 purchases

Sailmate

One-time1
  • France SHOM chart subscription$54.99

Questions

Is C free?
C is free to download, with in-app purchases available.
Is Sailmate free?
Sailmate is free to download, with in-app purchases available.
Which has better reviews, C or Sailmate?
C is rated higher. C averages 4.5 out of 5 from 2.3K ratings, while Sailmate averages 3.0 from 1 ratings.
Do C or Sailmate have ads?
Neither C nor Sailmate shows ads.
Which is updated more often, C or Sailmate?
C ships an update every 6 weeks, and Sailmate every 6 weeks. Most recently, C was updated on October 13, 2026 and Sailmate on October 7, 2026.

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